worktree: allow the main brach of a bare repository to be checked out

In bare repositories, get_worktrees() still returns the main repository,
so git worktree list can show it. ignore it in find_shared_symref so we
can still check out the main branch.

Signed-off-by: Dennis Kaarsemaker <dennis@kaarsemaker.net>
Acked-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/worktree.c b/worktree.c
index 5acfe4c..f7869f8 100644
--- a/worktree.c
+++ b/worktree.c
@@ -345,6 +345,8 @@ const struct worktree *find_shared_symref(const char *symref,
 
 	for (i = 0; worktrees[i]; i++) {
 		struct worktree *wt = worktrees[i];
+		if (wt->is_bare)
+			continue;
 
 		if (wt->is_detached && !strcmp(symref, "HEAD")) {
 			if (is_worktree_being_rebased(wt, target)) {